The previous chapters have included a comprehensive discussion of general issues concerning e-partnership management from both technology and people perspectives, and, continuing this theme, this chapter presents extended and systematic multiple case studies which allow a more profound exploration of the way in which companies have partnered in e-business. It also contains an in-depth examination of specific issues and problems raised in e-partnerships. The cases selected for the case studies represent a broad range of interests, from big brand dotcoms like Yahoo! and Google to a small manufacturer that has embraced e-business and e-partnership technologies and practices. The case studies are followed by a cross-case analysis of the key issues in relation to the development of e-partnerships. Key successful factors are identified from the successful cases, along with the hard lessons learned from failure.